CODEWITHSUNDEEP
bpmncamunda
Mehran
Mehran

Reputation: 16831

Setting an execution's local variable according to the flow led to the sub-process

I have a BPMN process with a sub-process within it. There are different flows leading to the sub-process. And I want to know, once inside the sub-process' execution, which flow has led to the current execution.

To this end I think variables could be handy. So I conducted a test in which I wrote a couple of scripts for flow's listener leading to the sup-process.

execution.setVariableLocal("V", "Expecting it to be local to the sub-process' execution");

But it turned out that execution points to the outer/parent process and thus the variable was set in parent scope.

So is there anyway to set an execution local variable from outside?

Upvotes: 0

Views: 2041

Answers (1)

thorben
thorben

Reputation: 1587

The simplest approach (basically use getVariable instead of getVariableLocal):

  1. Add an execution listener to the take event of the sequence flows of interest

  2. In the execution listener, perform 

    execution.setVariableLocal("flowTaken", execution.getCurrentTransitionId());

  3. Access it in the sub process via 

    execution.getVariable("flowTaken");

If it has to be a local variable in the sub process:

  1. Add an execution listener to the take event of the sequence flows of interest

  2. In the execution listener, perform 

    execution.setVariableLocal("flowTaken", execution.getCurrentTransitionId());

  3. In the BPMN 2.0 XML, define a variable input mapping for the subprocess: 

    <subProcess ...>
  <extensionElements>
    <camunda:inputOutput>
      <camunda:inputParameter name="flowTakenAsSubprocessLocalVariable">${flowTaken}</camunda:inputParameter>
    </camunda:inputOutput>
  </extensionElements>
  ...
</subProcess>

Upvotes: 4

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